,

The structure of almost all graphs in a hereditary property

, , , и .
(2009)cite arxiv:0905.1942 Comment: 29 pages.

Аннотация

A hereditary property of graphs is a collection of graphs which is closed under taking induced subgraphs. The speed of \P is the function n \mapsto |\P_n|, where \P_n denotes the graphs of order n in \P. It was shown by Alekseev, and by Bollobas and Thomason, that if \P is a hereditary property of graphs then |\P_n| = 2^(1 - 1/r + o(1))n^2/2, where r = r(\P) \N is the so-called `colouring number' of \P. However, their results tell us very little about the structure of a typical graph G \P. In this paper we describe the structure of almost every graph in a hereditary property of graphs, \P. As a consequence, we derive essentially optimal bounds on the speed of \P, improving the Alekseev-Bollobas-Thomason Theorem, and also generalizing results of Balogh, Bollobas and Simonovits.

тэги

Пользователи данного ресурса

  • @apford

Комментарии и рецензии